i thikn with air tanks comming down in price, its almost a must....i have the electra...played with co2 2 times and hated it....terrible consitancy. when i got my HPA i went to teh chrono and shot 10 balls all around 280 (+-3) HPA is soooooooo nice to have

i donno where you guys play, but all day air is included with entry at every field ive ever been to. co2 on the other hand is free at some, but more often than not you have to pay for co2. so depending on how much you play, around here HPA pays for itself in time.